# Best office chairs under £300 Source: https://chairandposture.co.uk/best/best-office-chair-under-300 Publisher: Chair and Posture. Picks are based on what the Amazon listings state, not on hands-on testing. Method: https://chairandposture.co.uk/how-we-pick Below the premium brands, the mid-range is crowded with mesh chairs that look almost identical in photos. The differences that matter are in the details: whether the seat slides to fit your thigh length, whether the lumbar support actually moves, how many directions the armrests adjust in, and what load the chair is rated for. Those are the points the HSE workstation checklist cares about, and they are what this guide compares across seven chairs from Flexispot, ProtoArc, COLAMY, Tonfary, Sihoo, Songmics and Hbada. All figures come from the listings. Where a listing does not state something, such as seat depth travel or warranty, we flag it. If you only remember one rule, prioritise seat depth and lumbar adjustment over extras like footrests and headrests. ## Products ### 1. FLEXISPOT ErgoX Ergonomic Office Chair, Executive Mesh Desk Chair with Height Adjustable Seat, Headrest, Armrests & Independent Lumbar Support, Swivel Task Chair,Dark Grey Mesh areas: Seat and back; Lumbar: Adaptive, 3 modules; Armrests: 3D; Tilt: Weight-sensing, 135°; Max load: 136 kg A mesh chair using German-manufactured mesh on seat and back, with adaptive lumbar, a 6 cm seat slide and 3D arms. It suits users who want seat depth and a self-balancing recline. In its favour: - Flexispot states the seat and back use German-manufactured mesh that moves with your back. - Seat depth adjusts over 6 cm and seat height over 9 cm. - Materials are stated to pass performance tests beyond 120,000 cycles. Good to know: - No warranty period is given anywhere in this listing. - The 3D armrests do not pivot inwards, which some typists prefer. ### 2. COLAMY Ergonomic Mesh Office Chair, High Back Computer Executive Desk Chair with Adjustable Headrest and 4D Arms, Slide Seat, Tilt Lock, Dark Grey Seat depth: Sliding seat; Lumbar: Height adjustable; Armrests: 4D; Tilt: 4-position tilt lock; Max load: 137 kg A high-back mesh chair with 4D armrests, a sliding seat, adjustable lumbar and headrest, and an aluminium base. A sensible pick for a tall desk setup that needs every main adjustment. In its favour: - It brings together 4D armrests, a sliding seat, adjustable lumbar, headrest and a 4-position tilt lock in one chair. - The base is aluminium alloy and the class 4 gas cylinder is stated as SGS verified. - The seat cushion uses high-density moulded foam with a mesh back, a common mix for warm rooms. Good to know: - The spec table lists only a 1-year warranty, shorter than most chairs in this guide. - The listing does not state how far the seat slides or how much the lumbar moves. ### 3. ProtoArc EC200 Ergonomic Office Chair with Adjustable Seat Depth, Black Seat depth: 33 to 43 cm, 5 levels; Lumbar: 6 cm height, 2 cm depth; Armrests: 7 cm height; Tilt: 4 positions, 90° to 130°; Max load: 100 kg A mesh chair with a clearly stated 33 to 43 cm seat depth range, two-way lumbar and a 4-position recline. It is a sound entry point for a home office with a standard-height desk. In its favour: - The listing gives the seat depth range in centimetres (33 to 43 cm), which makes fit easy to check against your thighs. - Two-way lumbar moves 6 cm vertically and 2 cm in depth, and the recline tension has its own knob. - ProtoArc quotes a 5-year warranty with free replacement parts and a class 4 gas lift tested to EN 16955. Good to know: - The armrests only adjust in height (7 cm), so they cannot slide or pivot to meet the desk edge. - A 220 lb (100 kg) load rating limits it for heavier users. ### 4. Ergonomic Mesh Office Chair with Adjustable Seat Depth, Big & Tall Maker's height range: 160 to 192 cm; Seat height: About 45 to 55 cm; Seat depth: 50 cm, sliding; Back: About 75 to 80 cm; Max load: 150 kg A big mesh chair for users from 160 to 192 cm, with a sliding 50 cm deep seat, a tall back of about 75 to 80 cm and a 150 kg rating. It suits tall, broader users on a mid-range budget. In its favour: - The backrest height of about 75 to 80 cm is the tallest stated among the mesh chairs here. - The seat is about 50.5 cm wide and 50 cm deep and slides forward for longer thighs. - A 150 kg load rating covers taller users who are also heavier. Good to know: - The seat height tops out at about 55 cm, lower than the Elabest and Hinomi. - No warranty length is given in the listing. ### 5. SONGMICS Ergonomic Office Chair, S-Shaped Backrest, Adjustable Tilt Seat depth: Not stated; Lumbar: Adjustable; Armrests: 4D; Recline: 90° to 135°; Max load: 150 kg A mesh chair with an S-shaped back, adjustable lumbar, 4D arms and a 2D headrest, rated to 150 kg with a 5-year warranty. It suits people who want good arm adjustment and a long warranty. In its favour: - 4D armrests and a 2D headrest are included, along with a tilt range of 90° to 135°. - A steel gas cylinder and metal base support up to 150 kg, according to Songmics. - The listing states a 5-year warranty, one of the longest at this level. Good to know: - There is no mention of seat depth adjustment, so check the 52 cm seat depth suits your thigh length. - The overall width of 70 cm is generous, which may be tight in a small box room. ### 6. SIHOO M18 Ergonomic Office Chair, Adjustable Lumbar Support, 330 lb, Black Seat depth: Not stated; Lumbar: Adjustable back support; Armrests: Height adjustable; Recline: 4 positions; Max load: 150 kg A long-running Sihoo design with a mesh back, adjustable back support and headrest, a waterfall-edge seat and a 150 kg rating. It suits people who want a simple, proven layout. In its favour: - Five adjustment settings cover back support, headrest, seat height, recline and armrest height. - The seat has a W-shaped cushion and a waterfall front edge, which Sihoo says keeps pressure off the legs. - Sihoo states BIFMA testing, a 150 kg rating and a 3-year parts warranty. Good to know: - The seat does not slide, so shorter or taller users cannot fine-tune seat depth. - The armrests only move up and down, with no forward, back or pivot movement. ### 7. Hbada P5 Ergonomic Office Chair with Adjustable Headrest and Lumbar Support, Comfy Seat Cushion Support Computer Chair Tilt Function Swivel Mesh with Footrest Seat depth: Not stated; Lumbar: Up and down; Armrests: Height adjustable; Recline: Up to 135°; Max load: 150 kg A mesh chair with a 16-spring seat cushion, height-adjustable lumbar, a swivelling headrest and a pull-out footrest. It suits people who split their day between desk work and resting. In its favour: - The seat uses 16 independent springs and memory foam, a sturdier build than plain foam at this level. - The headrest moves about 10 cm in height and swivels up to 40°. - A pull-out footrest and 135° recline are included for breaks away from the keyboard. Good to know: - Seat height travel is only about 8.5 cm, so check it against your desk height. - No seat depth adjustment is mentioned in the listing. As an Amazon Associate we earn from qualifying purchases.